Improvement in furnace-grates



s. n. Moons,

n.Furnace-(irate.

N0. 165,943". Patente'dluly27,l875.

jim/Zim N.PETERS. PHDL'DLITMOGRAPHER. wAsHmON. 11C.

UNITED STATES GEORGE BEMOORE, OF PHILADELPHIA, PENNSYLVANIA.

`IMPROVEMENT IN FURNACE1GRA`TES.

i Specification forming part of Letters Patent No. [65.943, dated July27, 1875 `.application,filed February 9, 1875.

To all whom it may concern Beit knownthat I, GEO. E. MOORE, of thespecification The object of my invention is twofold: I aim, first, toprovide such a form for gratebars used in lire-beds as to increase theiref-` fectiveness, durability, and convenience 5 and, second, to improvethe whole iirebed in form,

construction, and accessories, that ashes, cin-4 der, slate, and'stonemay be discharged freely ,through it into the ash-pit for cleaning theire, causing at the same time no leakage or waste of coal in theprocess.

I aim to provide a serviceable and conven ient iire-bed complete in allrespects, and applicable to all varieties of situations where fire-bedsare used. I use two series of very Wide bars, placed on horizontal linesabove each other, and relatively to perpendicular lines, so arrangedthat the bars in one series shall fill the spaces of those in the otherseY ries.

The drawings herewith presented show three main ba'rs in the upperseries and three thin bars in the lower series.v It is obvious that anynumber of bars desired in one set may be combined substantially asshown, and that any number of sets may be placed together to constitutelarger fire-beds to any extent.

The iirst necessity in providing a good hrebed for large fires is tohave bars that will not too much obstruct the large volume ot' airrequired to sustain rapid combustion, and at the same time be capable ofkeeping their proper form under the intense heat of use under a cleanlire and ,strong draft. To meet this want I have taken a very wide andthick bar and braced it with a deep central rib be low, and then piercedthe bar on either side of this central rib with conical apertures oilsuch size as to supply air abundantly. The air passing thus throughthese apertures tends t0 keep the lower portion ofthe bar cool, and thusthe whole bar from changing form. The upper series of bars are hung onknife-edge bearings circumscribed with a ilange upon and extendinginward from the frame-work in which they are hung. Easy vibration of thebars and sure protection against displacement are thus securedby thiscombination bearing, which embodies central frictionless working jointwithin the external form ot' a journal-box, loosely embracing the endsof the bars. If the central bearin g were removed the ends of the barswould still be as journals properly boxed for oscillation.Furtherinstrumentalities for oscillating `these bars are, a hanger fromeach one down to a connecting-rod, crosswise with which they are loosely]'ointed and all operated together; also, in this case a direct lever ispivoted to the framework back and below the tire-bed,p`from which itpasses to the front, embracing at the center the hanger of one of thegrate-bars. At the front it serves as a manual lever for vibrating allthe bars in this set at once. The lower series 'of bars, though wide,are thin and light. They are protected from the tire by distance from itand by ashes from the lire above. They are hung on common journals nearone side, at each end, so as to swing down when it is desired to emptythem ofthe refuse products of combustion. They have hangers cast uponthe lower side, near the front end, through which an arm is extended tothe front, where it serves as a manual lever. It is also received by ahanging latch when the bars are to be held in a horizontal position.From one of these hangers to another a rod is connected for operatingtogether as many,

bars as may be desired.

Figure l is a perspective View of the whole {ire-bed with portionsbroken away, that all the mechanism employed in it may be seen andunderstood in its working condition. It shows an empty bearing, and isbroken away at both ends to indicate that it may be extended at will.Fig. 2 is a vertical transverse section7 in which every distinct pieceot mech- I anism in the whole tire-bed is also indicated. Fig. 3 is avertical transverse section of a single main bar. It is taken atrightangles .to Fig. 2.

A is the main tire-grate bar, thick and wide in its Lipper part, l, andstrongly braced with a deep central rib below, and perforated with asmany conical apertures k as may be desired for the draft; B B, thebed-plates., in which all the bars in both the upper and lower seriesare hung, and to which the latch F is jointed and the hanger n rigidlyattached. C C C are the light wide swinging bars, constituring the lowerseries of bars. Each one is journaled to the framework, as seen at i.They are all connected by the rod G, loosely pivoted tothe hangers h ath', and thus all are operated together by the handle H, which is latchedupon the swinging hook F, to hold them all in a horizontal position.They are emptied by withdrawing F from H, when they swing down in thedirection shown by the ar- Y row near H.YY D, the Vknife-edge bearing,upon which the main lire-bars rest and are operated; d, the boxing, inwhich the bars work loosely and without friction, while at the same timeprotected by it from displacement, as before stated. b is a flange fromthe bed-plate, to shelve over the ends of O O O, so that no cinder canfall in wedgewise and obstruct the freedom of their working. E shows theform of the ends of the main bars for resting and operating on D; o,ahanger pivoted to the rib of the'main bar, and connecting it with theoperating-lever m, and by means of the connecting-rod P bringing all thebars in this set under the same control. As o would bein the way inhandling` bars for shipping it is so attached as to swing aside, asshown in dot-ted lines. v The combination of m with all the main bars Athrough the connecting-rod P secures the vibration of all of' themwhenever m is vibrated by hand or otherwise.

The operation of cleaning the fire is as follows: First set free thebars C C O, to swing down and empty themselves of what ashes and cindermay be upon them. Then latch them up and oscillate the main bars brisklyby the lever m, when ashes and oinder will be found again to load thebars C O C, when again they must be emptied, and this process continueduntil the fire becomes as clean as may be desired.

I claim-Y 1. The upper seriesY of vibrating bars A, in Y il combinationwith the lower series of swinging bars C, as and for the purpose hereinset forth. v 2. The bed-plates B, having each central bearing D providedwith side flanges d, as and for the purpose specified.

3. The swinging bar O, in combination with an upper series of bars, asand for the purpose c herein set forth.

4. The latch F, in combination with the bar O, as and for the purposeherein set forth.

5. In combination, the bars A, hangers o, and lever m, as and for thepurpose herein set forth.

' GEO. R. MOORE.

Witnesses:

J. PLANKINTON, WM. C. HANNIs.

